446 lines
12 KiB
C++
446 lines
12 KiB
C++
#include "input.h"
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#include <SDL3/SDL_error.h> // Para SDL_GetError
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#include <SDL3/SDL_init.h> // Para SDL_INIT_GAMEPAD, SDL_InitSubSystem
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#include <SDL3/SDL_keyboard.h> // Para SDL_GetKeyboardState
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#include <SDL3/SDL_log.h> // Para SDL_LogInfo, SDL_LogCategory, SDL_Log...
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#include <algorithm> // Para find
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#include <iterator> // Para distance
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#include <unordered_map> // Para unordered_map, operator==, _Node_cons...
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#include <utility> // Para pair
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// [SINGLETON]
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Input *Input::input_ = nullptr;
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// [SINGLETON] Crearemos el objeto con esta función estática
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void Input::init(const std::string &game_controller_db_path)
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{
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Input::input_ = new Input(game_controller_db_path);
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}
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// [SINGLETON] Destruiremos el objeto con esta función estática
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void Input::destroy()
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{
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delete Input::input_;
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}
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// [SINGLETON] Con este método obtenemos el objeto y podemos trabajar con él
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Input *Input::get()
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{
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return Input::input_;
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}
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// Constructor
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Input::Input(const std::string &game_controller_db_path)
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: game_controller_db_path_(game_controller_db_path)
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{
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// Inicializa el subsistema SDL_INIT_GAMEPAD
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initSDL();
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// Busca si hay mandos conectados
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discoverGameControllers();
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// Inicializa los vectores
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key_bindings_.resize(static_cast<int>(InputAction::SIZE), KeyBindings());
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controller_bindings_.resize(num_gamepads_, std::vector<ControllerBindings>(static_cast<int>(InputAction::SIZE), ControllerBindings()));
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// Listado de los inputs para jugar que utilizan botones, ni palancas ni crucetas
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button_inputs_ = {InputAction::FIRE_LEFT, InputAction::FIRE_CENTER, InputAction::FIRE_RIGHT, InputAction::START};
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}
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// Asigna inputs a teclas
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void Input::bindKey(InputAction input, SDL_Scancode code)
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{
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key_bindings_.at(static_cast<int>(input)).scancode = code;
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}
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// Asigna inputs a botones del mando
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void Input::bindGameControllerButton(int controller_index, InputAction input, SDL_GamepadButton button)
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{
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if (controller_index < num_gamepads_)
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{
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controller_bindings_.at(controller_index).at(static_cast<int>(input)).button = button;
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}
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}
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// Asigna inputs a botones del mando
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void Input::bindGameControllerButton(int controller_index, InputAction input_target, InputAction input_source)
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{
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if (controller_index < num_gamepads_)
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{
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controller_bindings_.at(controller_index).at(static_cast<int>(input_target)).button = controller_bindings_.at(controller_index).at(static_cast<int>(input_source)).button;
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}
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}
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// Comprueba si un input esta activo
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bool Input::checkInput(InputAction input, bool repeat, InputDeviceToUse device, int controller_index)
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{
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bool success_keyboard = false;
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bool success_controller = false;
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const int input_index = static_cast<int>(input);
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if (device == InputDeviceToUse::KEYBOARD || device == InputDeviceToUse::ANY)
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{
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const bool *keyStates = SDL_GetKeyboardState(nullptr);
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if (repeat)
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{
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success_keyboard = keyStates[key_bindings_[input_index].scancode] != 0;
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}
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else
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{
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if (!key_bindings_[input_index].active)
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{
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if (keyStates[key_bindings_[input_index].scancode] != 0)
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{
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key_bindings_[input_index].active = true;
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success_keyboard = true;
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}
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else
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{
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success_keyboard = false;
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}
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}
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else
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{
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if (keyStates[key_bindings_[input_index].scancode] == 0)
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{
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key_bindings_[input_index].active = false;
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}
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success_keyboard = false;
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}
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}
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}
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if (gameControllerFound() && controller_index >= 0 && controller_index < num_gamepads_)
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{
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if ((device == InputDeviceToUse::CONTROLLER) || (device == InputDeviceToUse::ANY))
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{
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success_controller = checkAxisInput(input, controller_index, repeat);
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if (!success_controller)
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{
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if (repeat)
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{
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success_controller = SDL_GetGamepadButton(connected_controllers_.at(controller_index), controller_bindings_.at(controller_index).at(input_index).button) != 0;
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}
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else
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{
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if (!controller_bindings_.at(controller_index).at(input_index).active)
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{
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if (SDL_GetGamepadButton(connected_controllers_.at(controller_index), controller_bindings_.at(controller_index).at(input_index).button) != 0)
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{
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controller_bindings_.at(controller_index).at(input_index).active = true;
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success_controller = true;
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}
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else
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{
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success_controller = false;
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}
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}
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else
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{
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if (SDL_GetGamepadButton(connected_controllers_.at(controller_index), controller_bindings_.at(controller_index).at(input_index).button) == 0)
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{
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controller_bindings_.at(controller_index).at(input_index).active = false;
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}
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success_controller = false;
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}
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}
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}
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}
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}
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return (success_keyboard || success_controller);
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}
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// Comprueba si hay almenos un input activo
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bool Input::checkAnyInput(InputDeviceToUse device, int controller_index)
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{
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if (device == InputDeviceToUse::KEYBOARD || device == InputDeviceToUse::ANY)
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{
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const bool *mKeystates = SDL_GetKeyboardState(nullptr);
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for (int i = 0; i < (int)key_bindings_.size(); ++i)
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{
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if (mKeystates[key_bindings_[i].scancode] != 0 && !key_bindings_[i].active)
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{
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key_bindings_[i].active = true;
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return true;
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}
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}
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}
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if (gameControllerFound())
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{
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if (device == InputDeviceToUse::CONTROLLER || device == InputDeviceToUse::ANY)
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{
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for (int i = 0; i < (int)controller_bindings_.size(); ++i)
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{
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if (SDL_GetGamepadButton(connected_controllers_[controller_index], controller_bindings_[controller_index][i].button) != 0 && !controller_bindings_[controller_index][i].active)
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{
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controller_bindings_[controller_index][i].active = true;
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return true;
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}
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}
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}
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}
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return false;
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}
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// Comprueba si hay algún botón pulsado. Devuelve 0 en caso de no encontrar nada o el indice del dispositivo + 1. Se hace así para poder gastar el valor devuelto como un valor "booleano"
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int Input::checkAnyButtonPressed(bool repeat)
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{
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// Si está pulsado el botón de servicio, ningún botón se puede considerar pulsado
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if (checkInput(InputAction::SERVICE, INPUT_ALLOW_REPEAT, InputDeviceToUse::ANY))
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{
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return 0;
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}
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// Solo comprueba los botones definidos previamente
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for (auto bi : button_inputs_)
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{
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// Comprueba el teclado
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if (checkInput(bi, repeat, InputDeviceToUse::KEYBOARD))
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{
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return 1;
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}
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// Comprueba los mandos
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for (int i = 0; i < num_gamepads_; ++i)
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{
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if (checkInput(bi, repeat, InputDeviceToUse::CONTROLLER, i))
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{
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return i + 1;
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}
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}
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}
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return 0;
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}
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// Busca si hay mandos conectados
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bool Input::discoverGameControllers()
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{
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bool found = false;
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if (SDL_AddGamepadMappingsFromFile(game_controller_db_path_.c_str()) < 0)
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{
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Error: could not load %s file: %s", game_controller_db_path_.c_str(), SDL_GetError());
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}
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SDL_GetJoysticks(&num_joysticks_);
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num_gamepads_ = 0;
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// Cuenta el número de mandos
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joysticks_.clear();
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for (int i = 0; i < num_joysticks_; ++i)
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{
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auto joy = SDL_OpenJoystick(i);
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joysticks_.push_back(joy);
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if (SDL_IsGamepad(i))
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{
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num_gamepads_++;
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}
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}
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SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "\n** LOOKING FOR GAME CONTROLLERS");
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if (num_joysticks_ != num_gamepads_)
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{
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SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "Joysticks found: %d", num_joysticks_);
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SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "Gamepads found : %d", num_gamepads_);
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}
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else
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{
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SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "Gamepads found: %d", num_gamepads_);
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}
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if (num_gamepads_ > 0)
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{
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found = true;
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for (int i = 0; i < num_gamepads_; i++)
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{
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// Abre el mando y lo añade a la lista
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auto pad = SDL_OpenGamepad(i);
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if (SDL_GamepadConnected(pad) == 1)
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{
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connected_controllers_.push_back(pad);
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const std::string name = SDL_GetGamepadNameForID(i);
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SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "#%d: %s", i, name.c_str());
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controller_names_.push_back(name);
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}
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else
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{
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_GetError() = %s", SDL_GetError());
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}
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}
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SDL_SetGamepadEventsEnabled(true);
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}
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SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "\n** FINISHED LOOKING FOR GAME CONTROLLERS");
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return found;
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}
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// Comprueba si hay algun mando conectado
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bool Input::gameControllerFound() { return num_gamepads_ > 0 ? true : false; }
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// Obten el nombre de un mando de juego
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std::string Input::getControllerName(int controller_index) const { return num_gamepads_ > 0 ? controller_names_.at(controller_index) : std::string(); }
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// Obten el número de mandos conectados
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int Input::getNumControllers() const { return num_gamepads_; }
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// Obtiene el indice del controlador a partir de un event.id
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int Input::getJoyIndex(SDL_JoystickID id) const
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{
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for (int i = 0; i < num_joysticks_; ++i)
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{
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if (SDL_GetJoystickID(joysticks_[i]) == id)
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{
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return i;
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}
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}
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return -1;
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}
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// Muestra por consola los controles asignados
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void Input::printBindings(InputDeviceToUse device, int controller_index) const
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{
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if (device == InputDeviceToUse::ANY || device == InputDeviceToUse::KEYBOARD)
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{
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return;
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}
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if (device == InputDeviceToUse::CONTROLLER)
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{
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if (controller_index >= num_gamepads_)
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{
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return;
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}
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// Muestra el nombre del mando
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SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "\n%s", controller_names_.at(controller_index).c_str());
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// Muestra los botones asignados
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for (auto bi : button_inputs_)
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{
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SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "%s : %d", to_string(bi).c_str(), controller_bindings_.at(controller_index).at(static_cast<int>(bi)).button);
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}
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}
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}
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// Obtiene el SDL_GamepadButton asignado a un input
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SDL_GamepadButton Input::getControllerBinding(int controller_index, InputAction input) const
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{
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return controller_bindings_[controller_index][static_cast<int>(input)].button;
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}
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// Obtiene el indice a partir del nombre del mando
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int Input::getIndexByName(const std::string &name) const
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{
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auto it = std::find(controller_names_.begin(), controller_names_.end(), name);
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return it != controller_names_.end() ? std::distance(controller_names_.begin(), it) : -1;
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}
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// Convierte un InputAction a std::string
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std::string Input::to_string(InputAction input) const
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{
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switch (input)
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{
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case InputAction::FIRE_LEFT:
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return "input_fire_left";
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case InputAction::FIRE_CENTER:
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return "input_fire_center";
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case InputAction::FIRE_RIGHT:
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return "input_fire_right";
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case InputAction::START:
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return "input_start";
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case InputAction::SERVICE:
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return "input_service";
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default:
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return "";
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}
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}
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// Convierte un std::string a InputAction
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InputAction Input::to_inputs_e(const std::string &name) const
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{
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static const std::unordered_map<std::string, InputAction> inputMap = {
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{"input_fire_left", InputAction::FIRE_LEFT},
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{"input_fire_center", InputAction::FIRE_CENTER},
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{"input_fire_right", InputAction::FIRE_RIGHT},
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{"input_start", InputAction::START},
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{"input_service", InputAction::SERVICE}};
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auto it = inputMap.find(name);
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return it != inputMap.end() ? it->second : InputAction::NONE;
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}
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// Comprueba el eje del mando
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bool Input::checkAxisInput(InputAction input, int controller_index, bool repeat)
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{
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// Umbral para considerar el eje como activo
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const Sint16 threshold = 30000;
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bool axis_active_now = false;
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switch (input)
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{
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case InputAction::LEFT:
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axis_active_now = SDL_GetGamepadAxis(connected_controllers_[controller_index], SDL_GAMEPAD_AXIS_LEFTX) < -threshold;
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break;
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case InputAction::RIGHT:
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axis_active_now = SDL_GetGamepadAxis(connected_controllers_[controller_index], SDL_GAMEPAD_AXIS_LEFTX) > threshold;
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break;
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case InputAction::UP:
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axis_active_now = SDL_GetGamepadAxis(connected_controllers_[controller_index], SDL_GAMEPAD_AXIS_LEFTY) < -threshold;
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break;
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case InputAction::DOWN:
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axis_active_now = SDL_GetGamepadAxis(connected_controllers_[controller_index], SDL_GAMEPAD_AXIS_LEFTY) > threshold;
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break;
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default:
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return false;
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}
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// Referencia al binding correspondiente
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auto &binding = controller_bindings_.at(controller_index).at(static_cast<int>(input));
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if (repeat)
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{
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// Si se permite repetir, simplemente devolvemos el estado actual
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return axis_active_now;
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}
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else
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{
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// Si no se permite repetir, aplicamos la lógica de transición
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if (axis_active_now && !binding.axis_active)
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{
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// Transición de inactivo a activo
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binding.axis_active = true;
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return true;
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}
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else if (!axis_active_now && binding.axis_active)
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{
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// Transición de activo a inactivo
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binding.axis_active = false;
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}
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// Mantener el estado actual
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return false;
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}
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}
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void Input::initSDL()
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{
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if (SDL_WasInit(SDL_INIT_GAMEPAD) != 1)
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{
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if (!SDL_InitSubSystem(SDL_INIT_GAMEPAD))
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{
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_GAMEPAD could not initialize! SDL Error: %s", SDL_GetError());
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}
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else
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{
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SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "SDL_GAMEPAD: Initialization complete.");
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}
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}
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} |